Static electricity detection pen, static electricity detection method and static electricity detection equipment

Abstract

The present invention provides an electrostatic detection pen, an electrostatic detection method and an electrostatic detection device, wherein an electrostatic charge sensing component is used to sense the electrostatic charge on a passive object and gather the electrostatic charge into an electrostatic electric field; an electric field sensor is connected to the electrostatic charge sensing component, and is used to sense the electrostatic charge in the electrostatic electric field and convert the electrostatic charge into a corresponding electrostatic charge value; wherein the electrostatic charge sensing component comprises: a shell, in which a convergence area for gathering electrostatic charge is formed; an electrostatic charge guiding component, comprising a first end and a second end connected, wherein the first end is located outside the shell, and after contacting the passive object, it senses the electrostatic charge on the passive object; the second end is placed in the convergence area, and is used to release the electrostatic charge sensed by the first end into the convergence area to form an electrostatic electric field. The present invention can increase the signal strength of the electrostatic charge, thereby improving the accuracy of the electrostatic charge value corresponding to the electrostatic charge.

Description

Technical Field

[0001] The present invention relates to the technical field of static electricity detection, in particular to a static electricity detection pen, a static electricity detection method and a static electricity detection device. Background Art

[0002] The static electricity detection pen uses the principle of electrostatic induction to detect the static charge value accumulated on an object. The existing static electricity detection pen mainly includes a probe, a shell and a measuring unit, wherein the probe is located outside the shell and is used to detect the static charge on the object, and the measuring unit is located inside the shell and is connected to the probe through a wire to obtain the static charge value corresponding to the static charge.

[0003] However, when the object to be detected is a passive object (i.e., a passive product refers to a product that can work without external power or energy), since the static charge intensity on the passive object is weak, the static charge value corresponding to the static charge cannot be accurately obtained by the existing static detection pen. Summary of the invention

[0004] In view of the shortcomings existing in the above problems, the present invention provides an electrostatic detection pen, an electrostatic detection method and an electrostatic detection device which can increase the signal strength of electrostatic charge, thereby improving the accuracy of the electrostatic charge value corresponding to the electrostatic charge, and is more suitable for detecting electrostatic charge on passive objects.

[0005] To achieve the above-mentioned purpose, in a first aspect, the present invention provides an electrostatic detection pen, comprising:

[0006] An electrostatic charge sensing component, used to sense the electrostatic charge on a passive object and gather the electrostatic charge into an electrostatic electric field;

[0007] An electric field sensor, connected to the electrostatic charge sensing component, for sensing the electrostatic charge in the electrostatic electric field and converting the electrostatic charge into a corresponding electrostatic charge value;

[0008] Wherein, the electrostatic charge sensing component comprises:

[0009] a housing having a collection area formed therein for collecting static charges;

[0010] The electrostatic charge guiding component includes a first end and a second end connected to each other, wherein the first end is located outside the shell, and after contacting the passive object, it senses the electrostatic charge on the passive object; the second end is placed in the convergence area, and is used to release the electrostatic charge sensed by the first end into the convergence area to form an electrostatic electric field.

[0011] In one embodiment, the housing includes a first area and a second area that are connected and coaxially arranged, and a first assembly structure for connecting with the electric field sensor is formed on the inner wall surface of the second area;

[0012] The electrostatic charge guiding component includes a connected probe and an electrode, wherein the electrode includes a connected longitudinal strip and a base a, wherein the longitudinal strip is located inside the first area, the top of the longitudinal strip is in the same plane as the top of the shell, a coaxially arranged slot is provided at the top of the longitudinal strip, and the base a is located inside the second area; the probe includes a connected external part and an internal part, wherein the internal part is located inside the slot and connected to the electrode, and the bottom end of the external part covers the outside of the top of the electrode.

[0013] In one embodiment, the electrostatic charge guide assembly also includes an insulating component, which is clamped between the electrode and the outer shell, wherein the insulating component includes a longitudinal tube and a base b that are connected and coaxially arranged, the longitudinal tube is placed in the first area and abuts against the inner wall surface of the first area, and the base a is located in the second area and abuts against the inner wall surface of the top of the second area.

[0014] In one embodiment, a limiting protrusion is formed on the inner wall surface of the first region near the top thereof, and a limiting groove matching with the limiting protrusion is formed on the outer wall surface of the longitudinal tube near the top thereof.

[0015] In one embodiment, the top of the longitudinal strip, the top of the longitudinal tube and the top of the shell are in the same plane, and the shell, the probe, the electrode and the insulating component are coaxially arranged.

[0016] In one embodiment, the electric field sensor is a field mill type electric field sensor, which includes a shell and an electrostatic charge processing part disposed inside the shell;

[0017] Wherein, the housing comprises a second assembly structure connected to the electrostatic charge sensing component, and a charge sensing port facing the convergence area;

[0018] The electrostatic charge processing part includes an electrostatic charge sensing component, a voltage signal conversion component and a control component, wherein the electrostatic charge sensing component is used to obtain an AC voltage signal, and includes a sensitive structure, a rotating component, a small blade and a stator component, wherein the sensitive structure includes a shielding electrode and a ring-shaped sensing electrode, wherein the first part of the shielding electrode is located outside the sensing electrode, and the second part of the shielding electrode is embedded inside the sensing electrode, the stator component is located inside the second part of the shielding electrode, and a part of the rotating component is located inside the stator component, the shielding electrode and the small blade are respectively connected to the first end and the second end of the rotating component, and the stator component generates an electromagnetic field after being energized, and the rotating component drives the shielding electrode and the small blade to rotate synchronously through the electromagnetic field; wherein the end of the electrode is directed toward the sensitive structure through the convergence area to guide the electrostatic charge to the shielding electrode and the sensing electrode;

[0019] The voltage signal conversion component is used to convert the amplified AC voltage signal and the saturation signal into a DC voltage signal;

[0020] The control component is used to convert the DC voltage signal into an electrostatic charge value corresponding to the electrostatic charge.

[0021] In one embodiment, the sensitive structure further comprises a cover body and a lower shell body respectively arranged on the top end surface and the bottom end surface of the sensing electrode, a first hollow area is formed on the cover body, a second hollow area is formed on the sensing electrode, and a first concave cavity is formed on the lower shell body, wherein the first hollow area, the second hollow area and the first concave cavity are coaxially arranged, and the first hollow area is connected to the first concave cavity through the second hollow area;

[0022] The first part of the shielding electrode is located in the first hollow area, and the second part of the shielding electrode is respectively placed in the second hollow area and the first concave cavity, and is sleeved on the outer side of the stator assembly.

[0023] In one embodiment, the electrostatic charge sensing component also includes a photoelectric tube assembly and a shielding shell, wherein the shielding shell is located at the lower end of the lower shell, the second end of the rotating assembly, the photoelectric tube assembly and the small blade are all located inside the shielding shell, and the photoelectric tube assembly is arranged on the top end surface of the lower shell and faces the position of the small blade to obtain the rotation speed signal of the small blade.

[0024] In one embodiment, the rotating component includes a rotating shaft, and a first bearing and a second bearing respectively mounted on the outside of the rotating shaft, wherein the first end of the rotating shaft is placed inside the shielding electrode, the second end of the rotating shaft is placed inside the small blade, the first bearing is located inside the stator assembly, and the second bearing is located inside the lower shell.

[0025] In one embodiment, the control component includes a data processing unit, a PID control unit and a speed acquisition unit, wherein the PID control unit is connected to the stator component to control the stator component to drive the rotating component to drive the shielding electrode and the small blade to rotate synchronously according to the set speed value input by the PID control unit; the speed acquisition unit is connected to the photoelectric tube component to convert the speed signal of the small blade into the speed value of the small blade; the data processing unit is used to convert the DC voltage signal into an electrostatic charge value corresponding to the electrostatic charge, and to adjust the sensitivity of the sensing electrode according to the judgment result of the speed value of the small blade and the set speed value.

[0026] In one embodiment, the electrostatic charge processing part further includes a power supply part, and the power supply part is electrically connected to the electrostatic charge sensing component, the voltage signal conversion component and the control component respectively.

[0027] In a second aspect, the present invention provides a static electricity detection method, which is applied to the above-mentioned static electricity detection pen, comprising the following steps:

[0028] The electrostatic charge sensing component is in direct contact with the passive object to sense the electrostatic charge on the passive object and gather the electrostatic charge into an electrostatic electric field;

[0029] The electric field sensor senses the electrostatic charge in the electrostatic field and converts the electrostatic charge into a corresponding electrostatic charge value.

[0030] In a third aspect, the present invention provides an electrostatic detection device, including the above-mentioned electrostatic detection pen, and also including a terminal device connected to the electrostatic detection pen, wherein the terminal device at least displays an electrostatic charge value corresponding to the electrostatic charge.

[0031] Compared with the prior art, the present invention has one of the following advantages:

[0032] After the electrostatic charge sensing component is combined with the field mill electric field sensor, the sensed electrostatic charge can be gathered into an electrostatic electric field through the charge sensing component, and the electrostatic charge value corresponding to the electrostatic charge in the electrostatic electric field can be obtained through the field mill electric field sensor. Compared with the existing electrostatic detection equipment that can only detect a single electrostatic charge, the signal strength of the electrostatic charge can be increased, thereby improving the accuracy of the electrostatic charge value corresponding to the electrostatic charge;

[0033] Since the end of the electrode is located in the second region, it is convenient to release the guided electrostatic charge in the second region, so that the electrostatic charge can be accumulated in the second region to form an electrostatic electric field;

[0034] Since the static electricity detection pen in the present invention can gather static electricity into a static electricity field, it is more suitable for detecting static electricity on passive objects and obtaining corresponding static electricity value compared with existing static electricity detection equipment;

[0035] By adjusting the sensitivity of the sensing electrode to a stable state, the sensing electrode can stably sense the weak static charge in the electrostatic electric field and accurately obtain the static charge value corresponding to the static charge. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A three-dimensional diagram of the electrostatic detection device of the present invention;

[0037] Figure 2 for Figure 1 A stereogram from another perspective;

[0038] Figure 3 for Figure 1 Exploded diagram of

[0039] Figure 4 for Figure 1 A cross-sectional view of

[0040] Figure 5 for Figure 1 A magnified view of part A;

[0041] Figure 6 for Figure 1 A magnified view of part B;

[0042] Figure 7 for Figure 1 Exploded view of the electrostatic charge sensing component;

[0043] Figure 8 It is a cross-sectional view of the first embodiment of the present invention;

[0044] Fig. 9 for Figure 1 A stereogram of a mid-field mill-type electric field sensor;

[0045] Fig.10 for Fig. 9 Internal structure diagram;

[0046] Fig.11 It is a block diagram of the static electricity detection pen in the present invention.

[0047] The main reference numerals are as follows:

[0048] 1-electrostatic charge sensing component; 101-housing; 1011-first area; 1012-second area; 1013-first assembly structure; 102-probe; 1021-first part; 1022-second part; 1023-third part; 103-electrode; 1031-longitudinal strip; 10311-slot; 1032-base a; 104-insulating component; 1041-longitudinal tube; 10411-limiting groove; 1042-base b;

[0049] 2-field mill type electric field sensor; 201-housing; 202-second assembly structure; 203-shielding electrode; 2031-rotating blade; 2032-sleeve; 204-cover; 205-differential sensing electrode; 206-lower housing; 207-stator assembly; 208-rotating shaft; 209-first bearing; 210-second bearing; 211-photoelectric tube; 212-small blade; 213-shielding housing; 214-charge sensing port; 215-convex column; 216-bottom plate;

[0050] 3-fourth PCB board; 4-fifth PCB board; 5-sixth PCB board; 6-interface; 7-terminal device; 8-static detection pen; 9-server. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "top surface", "bottom surface", "inside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0053] Embodiment 1

[0054] like Figures 1 to 10As shown, the static detection pen includes a static charge sensing component 1 and a field milling electric field sensor 2 connected thereto. The static charge sensing component 1 includes a housing 101 , a probe 102 , an electrode 103 and an insulating component 104 .

[0055] In this embodiment, the housing 101 is a columnar structure, including an internal area running through the interior thereof, the internal area including a first area 1011 and a second area 1012 which are connected and coaxially arranged, and the diameter of the second area 1012 is greater than the diameter of the first area 1011. The top end surface of the first area 1011 is an open end, forming a part of the top end surface of the housing 101. The second area 1012 forms a convergence area for gathering static charges into an electrostatic electric field, and the bottom end surface of the second area 1012 is an open end, forming a part of the bottom end surface of the housing 101.

[0056] Furthermore, an annular step portion is provided on the inner wall surface of the first region 1011 near the top thereof to form a limiting protrusion.

[0057] A first assembly structure 1013 for connecting to the field mill type electric field sensor 2 is formed on the inner wall surface of the second area 1012 .

[0058] Preferably, the first assembly structure 1013 is a first thread formed on the inner wall surface of the second region 1012 .

[0059] Furthermore, a plurality of first thread grooves are formed on the top end surface of the second region 1012 , wherein the plurality of first thread grooves are all around the outside of the first region 1011 .

[0060] In this embodiment, the electrode 103 is made of a conductive copper material, and includes a connected longitudinal bar 1031 and a base a1032, wherein the longitudinal bar 1031 is located inside the first area 1011, the top of the longitudinal bar 1031 is in the same plane as the top of the outer shell 101, a coaxially arranged slot 10311 is provided at the top of the longitudinal bar 1031, and the base a1032 is located inside the second area 1012.

[0061] Furthermore, a plurality of second thread grooves are formed on the top end surface of the base a1032.

[0062] In this embodiment, the probe 102 is made of conductive copper material, and includes an external part and an internal part that are connected to each other, wherein the internal part is located inside the slot 10311 and connected to the electrode 103 , and the bottom end of the external part covers the outside of the top end of the electrode 103 .

[0063] Specifically, the probe 102 is composed of a first part 1021, a second part 1022 and a third part 1023 which are connected in sequence, coaxially arranged and have different diameters. The diameter of the second part 1022 is larger than the diameter of the third part 1023 and the diameter of the first part 1021. When the third part 1023 is placed inside the slot 10311, the bottom end surface of the second part 1022 covers the top of the longitudinal strip 1031 to shield the longitudinal strip 1031, ensuring that the static charge can only be guided to the electrode 103 through the probe 102.

[0064] Furthermore, the front end of the first part 1021 is a sharp structure. This design makes it easy for the front end of the first part 1021 to contact the detection part of a small-area passive product, thereby sensing the static charge on the small-area passive product.

[0065] Preferably, the passive product is a chip that is not powered on or is not connected to a power source, and the detection location of the passive product is the pin position of the chip.

[0066] In this embodiment, the insulating component 104 can be made of polytetrafluoroethylene material, and includes a longitudinal tube 1041 and a base b1042 that are connected and coaxially arranged. The longitudinal tube 1041 is placed in the first area 1011, and the outer wall surface of the longitudinal tube 1041 abuts against the inner wall surface of the first area 1011. The base b1042 is located in the second area 1012, and the top end surface of the base b1042 abuts against the inner wall surface of the top end of the second area 1012.

[0067] When the electrode 103 is assembled with the insulating component 104, the longitudinal tube 1041 passes through the interior of the base b1042 and is placed inside the longitudinal tube 1041, so that the inner wall surface of the longitudinal tube 1041 and the inner wall surface of the base b1042 are both in contact with the outer wall surface of the longitudinal strip 1031, and the top end surface of the base a1032 is in contact with the bottom end surface of the base b1042.

[0068] Since the longitudinal tube 1041 surrounds the outside of the longitudinal strip 1031 , when the third part 1023 is placed inside the slot 10311 , the bottom end surface of the second part 1022 simultaneously covers the top end surface of the longitudinal strip 1031 and a portion of the outside of the top end surface of the longitudinal tube 1041 .

[0069] Furthermore, an annular step portion is provided on the outer wall surface of the longitudinal tube 1041 near the top thereof, forming a limiting groove 10411 that matches the limiting protrusion.

[0070] A plurality of first threaded holes and a plurality of second threaded holes are also formed on the base b1042, wherein the plurality of first threaded holes are evenly spaced along a path in the first circumferential direction, and the plurality of second threaded holes are evenly spaced along a path in the second circumferential direction, wherein the plurality of second threaded holes surround the outer sides of the plurality of first threaded holes.

[0071] In this embodiment, after the electrode 103 is placed inside the insulating component 104, the first screw, the first threaded hole and the second threaded groove are matched to fix the electrode 103 on the insulating component 104. After the insulating component 104 is placed inside the housing 101, the second screw, the second threaded hole and the first threaded groove are matched to fix the insulating component 104 on the housing 101. When the housing 101, the probe 102, the electrode 103 and the insulating component 104 are assembled, the top end of the electrode 103, the top end of the longitudinal tube 1041 and the top end of the housing 101 are in the same plane, and the housing 101, the probe 102, the electrode 103 and the insulating component 104 are coaxially arranged.

[0072] In this embodiment, a limiting protrusion is formed on the inner wall surface near the top of the first area 1011, and a limiting groove 10411 matched with the limiting protrusion is formed on the outer wall surface near the top of the longitudinal tube 1041. The matching limiting protrusion and limiting groove 10411 facilitate the positioning of the insulating component 104 in the housing 101, so that the top end surface of the insulating component 104 and the top end surface of the electrode 103 after positioning can be in the same plane as the top end surface of the housing 101.

[0073] In this embodiment, since the end of the electrode is located in the second region, it is convenient to release the guided static charge in the second region, so that the static charge can be accumulated in the second region to form an electrostatic electric field.

[0074] In this embodiment, in order to improve the connection performance between the probe and the electrode, the probe and the electrode can be connected by a thread, wherein matching threads are formed on the outer wall surface of the third part of the probe and the inner wall surface of the slot.

[0075] In this embodiment, the field mill type electric field sensor 2 includes a housing 201 and an electrostatic charge processing part disposed inside the housing 201 .

[0076] Specifically, the shell 201 is made of a metallic conductive material, and includes a second assembly structure 202 connected to the electrostatic charge sensing component 1 , a charge sensing port 214 facing the convergence area, and a bottom plate 216 removably fixed on the bottom end surface of the shell 201 .

[0077] Furthermore, the second assembly structure 202 is a tube body disposed on the top end surface of the housing 201, wherein a second thread matching the first thread is formed on the outer wall surface of the tube body. When the field mill type electric field sensor 2 is assembled with the electrostatic charge sensing component 1, the tube body is placed in the second area 1012, so that the interior of the second area 1012 is connected to the charge sensing port 214, and the electrostatic charge in the second area 1012 is guided to the electrostatic charge processing part through the second area 1012 and the charge sensing port 214.

[0078] Specifically, the electrostatic charge processing part includes an electrostatic charge sensing component, a voltage signal conversion component, a control component, a power supply part and an interface 6, wherein the electrostatic charge sensing component, the voltage signal conversion component, the control component and the power supply part are sequentially stacked, and the electrostatic charge sensing component is sequentially electrically connected to the voltage signal conversion component and the control component. The interface 6 is electrically connected to the electrostatic charge sensing component, the voltage signal conversion component and the control component through the power supply part to supply power to the electrostatic charge sensing component, the voltage signal conversion component and the control component.

[0079] In this embodiment, a first opening is further formed on the bottom plate 216 .

[0080] Furthermore, the shape of the charge sensing port 214 is circular, and the shape of the first opening is square.

[0081] Furthermore, a light board is embedded on the outer wall surface of the shell 201 .

[0082] In this embodiment, the electrostatic charge sensing component is made of a metal conductive material, and includes a sensitive structure, and a first conversion unit and a second conversion unit electrically connected thereto, respectively.

[0083] Furthermore, the sensitive structure includes a shielding electrode 203 and a ring-shaped sensing electrode 205 .

[0084] The shielding electrode 203 includes a rotating blade 2031 (i.e., a first portion of the shielding electrode 203 ) and a hollow sleeve 2032 (i.e., a second portion of the shielding electrode 203 ). The rotating blade 2031 is rotatably located outside the differential sensing electrode 205 , and the sleeve 2032 is located in a second hollow region of the differential sensing electrode 205 .

[0085] Preferably, the rotating blade 2031 includes three identical fan-shaped blades and three identical spacing areas, and the shape and size of each fan-shaped blade are the same as the shape and size of each spacing area. The three fan-shaped blades and the three spacing areas are distributed outside the axis of the rotating blade 2031 in a staggered manner.

[0086] The differential sensing electrode 205 is made of copper material, and includes a first differential sensing electrode and a second differential sensing electrode.

[0087] Further, the differential sensing electrode 205 includes a ring-shaped first PCB board, a first differential sensing electrode, and a second differential sensing electrode. The first differential sensing electrode and the second differential sensing electrode are both arranged on the front panel of the first PCB board except the second hollow area and various positions, wherein the top end surface of the first differential sensing electrode and the top end surface of the second differential sensing electrode are both on the same plane.

[0088] Furthermore, the first differential sensing electrode includes three identical first fan-shaped differential sensing electrodes, and the second differential sensing electrode includes three identical second fan-shaped differential sensing electrodes. The shape and size of each first fan-shaped differential sensing electrode and the shape and size of each second fan-shaped differential sensing electrode are the same as the shape and size of each fan-shaped blade and the shape and size of each spacing area. Among them, the three first fan-shaped differential sensing electrodes and the three second fan-shaped differential sensing electrodes are distributed on the front panel except the second hollow area and each position in an interlaced manner, and a spacing area is provided between adjacent first fan-shaped differential sensing electrodes and second fan-shaped differential sensing electrodes, and the spacing area is a wall surface between the first fan-shaped differential sensing electrode and the second fan-shaped differential sensing electrode in the first PCB board where no first fan-shaped differential sensing electrode and second fan-shaped differential sensing electrode are provided. The wall surface is a non-conductive area.

[0089] When three identical first sector-shaped differential sensing electrodes and three identical second sector-shaped differential sensing electrodes are arranged on the first PCB board, the top end surfaces of the three identical first sector-shaped differential sensing electrodes and the top end surfaces of the three identical second sector-shaped differential sensing electrodes are all on the same plane.

[0090] When the shielding electrode 203 rotates to the first position, the rotating blade 2031 blocks the outside of the three first sector-shaped differential sensing electrodes, and at this time, the electrostatic charge contacts the three rotating blades 2031 and the three second sector-shaped differential sensing electrodes to obtain a second differential AC current signal. The second differential AC current signal includes a second positive AC current signal generated when the electrostatic charge contacts the three second sector-shaped differential sensing electrodes, and a second negative AC current signal generated when the electrostatic charge contacts the three rotating blades 2031.

[0091] When the shielding electrode 203 rotates to the second position, the rotating blade 2031 blocks the outside of the three second sector-shaped differential sensing electrodes, and at this time, the electrostatic charge contacts the three rotating blades 2031 and the three first sector-shaped differential sensing electrodes to obtain a first differential AC current signal. The first differential AC current signal includes a first positive AC current signal generated when the electrostatic charge contacts the three first sector-shaped differential sensing electrodes, and a first negative AC current signal generated when the electrostatic charge contacts the three rotating blades 2031.

[0092] Furthermore, as the shielding electrode 203 rotates, the rotating blades 2031 alternately shield the outsides of the three first sector-shaped differential sensing electrodes or the three second sector-shaped differential sensing electrodes, thereby continuously obtaining the first differential AC current signal and the second differential AC current signal.

[0093] In this embodiment, the sensitive structure also includes a cover body 204 and a lower shell 206 respectively arranged on the bottom end surface and the top end surface of the first PCB board, a first hollow area is formed on the cover body 204, and a first concave cavity is formed on the lower shell 206, wherein the first hollow area is coaxially arranged with the first concave cavity via the second hollow area, and the first hollow area is connected with the first concave cavity via the second hollow area.

[0094] The rotating blade 2031 is located in the first hollow area, a portion of the sleeve 2032 is placed in the first hollow area, and another portion of the sleeve 2032 is placed in the second hollow area and the first concave cavity in sequence.

[0095] Furthermore, the diameter of the first hollow area is greater than the diameter of the second hollow area. When the cover 204 is superimposed on the first PCB board, the cover 204 does not block the three first sector-shaped differential sensing electrodes and the three second sector-shaped differential sensing electrodes, so that the static charge can contact the unblocked rotating blades 2031, the three first sector-shaped differential sensing electrodes or the three second sector-shaped differential sensing electrodes.

[0096] Furthermore, the first cavity includes an annular protrusion 215 extending to the inside of the second hollow area. The protrusion 215 includes a first mounting area, and the outer diameter of the first mounting area is smaller than the outer diameter of other parts of the protrusion 215 except the first mounting area.

[0097] Furthermore, the cover 204, the first PCB board and the lower shell 206 can be fixed by fasteners.

[0098] In addition, a plurality of third threaded holes for connecting with the housing 201 are formed on the cover 204. When the electrostatic charge processing part is placed inside the housing 201, the threaded end of the third screw passes through the top of the housing 201 and is placed in the third threaded hole, thereby connecting the cover 204 to the top of the housing 201. In addition, when the bottom plate 216 is fixed to the bottom of the housing 201, the electrostatic charge processing part is fixed inside the housing 201.

[0099] When the bottom plate 216 is fixed to the bottom of the housing 201 , the first opening formed on the bottom plate 216 is sleeved on the outer side of the interface 6 .

[0100] In this embodiment, the electrostatic charge sensing component also includes a rotating component, a small blade 212, a photoelectric tube component, a stator and a shielding shell 213. The shielding shell 213 is located at the bottom of the lower shell 206. The bottom end of the rotating component, the photoelectric tube component and the small blade 212 are all located inside the shielding shell 213. The stator is located inside the sleeve 2032 and is sequentially placed inside the second hollow area and the first concave cavity. The small blade 212 is sleeved at the bottom end of the rotating component. A part of the rotating component sequentially passes through the inside of the stator and is then placed in the sleeve 2032. The stator drives the shielding electrode 203 and the small blade 212 to rotate synchronously through the rotating component. The photoelectric tube component is arranged on the bottom end surface of the lower shell 206, facing the small blade 212, so as to obtain the rotation speed signal of the small blade 212.

[0101] Furthermore, the stator is sleeved on the outside of the first mounting area in the boss 215. Since the outer diameter of the first mounting area is smaller than the outer diameter of other parts of the boss 215 except the first mounting area, the stator can be tightly sleeved on the outside of the first mounting area to prevent it from moving to other positions in the boss 215.

[0102] Further, the rotating assembly includes a rotating shaft 208, and a first bearing 209 and a second bearing 210 respectively sleeved on the outer side of the rotating shaft 208, wherein the bottom of the rotating shaft 208 is placed inside the small blade 212, and the top of the rotating shaft 208 passes through the inner rear fixed sleeve 2032 of the stator, and the first bearing 209 and the second bearing 210 are both placed in the third hollow area of ​​the boss 215, wherein the first bearing 209 is located inside the stator, and the second bearing 210 is located inside the lower housing 206. Since the outer wall surface of the rotating shaft 208 is in close contact with the inner wall surface of the first bearing 209 and the second bearing 210, the rotating shaft 208 can guide the static charge generated during rotation to the first bearing 209 and the second bearing 210.

[0103] Further, the photoelectric tube assembly includes a third PCB board and a photoelectric tube 211 solidified on the bottom end surface thereof. The third PCB board is fixed to the bottom end surface of the lower housing 206 by fasteners, and the photoelectric tube 211 is positioned toward the small blade 212 to obtain a rotation speed signal of the small blade 212.

[0104] Furthermore, the stator assembly 207 includes a stator and a second PCB board connected thereto. The second PCB board is fixed in the first cavity by a fastener, the stator is sleeved on the outside of the first mounting area, and the sleeve 2032 is sleeved on the outside of the stator. Under the control of the electrical signal, the electromagnetic coil wound on the stator generates an electromagnetic effect, and under the control of the electromagnetic effect, the rotating shaft 208 rotates inside the first bearing 209 and the second bearing 210, and at the same time drives the shielding electrode 203 and the small blade 212 to rotate synchronously.

[0105] The photoelectric tube assembly and the stator are both connected to the control assembly. At the same time, the control assembly determines whether the rotation speed value of the small blade 212 meets the set rotation speed value of the stator.

[0106] In this embodiment, the first conversion unit and the second conversion unit are both vertically arranged on the outer wall of the shielding shell 213, and the end of the first conversion unit is electrically connected to the first differential sensing electrode through the first PCB board, and the end of the second conversion unit is electrically connected to the second differential sensing electrode through the first PCB board.

[0107] Further, the first conversion unit includes a seventh PCB board, a first IV conversion unit solidified on the seventh PCB board, a first connection terminal solidified on the seventh PCB board at one end, and a first connection column solidified on the seventh PCB board at one end. The other end of the first connection terminal is connected to the fourth PCB board 3, and the other end of the first connection column is connected to the first PCB board, thereby being electrically connected to the first differential sensing electrode.

[0108] The second conversion unit includes an eighth PCB board, a second IV conversion unit solidified on the eighth PCB board, a second connection terminal solidified on the eighth PCB board at one end, and a second connection column solidified on the eighth PCB board at one end. The other end of the second connection terminal is connected to the fourth PCB board 3, and the other end of the second connection column is connected to the first PCB board, thereby being electrically connected to the second differential sensing electrode.

[0109] Exemplarily, when the shielding electrode 203 rotates to the second position, a first positive AC current signal is generated when the electrostatic charge contacts the three first sector-shaped differential sensing electrodes, and a first negative AC current signal is generated when the electrostatic charge contacts the three rotating blades 2031. The first positive AC current signal is converted into a first positive AC voltage signal by the first conversion unit, and the first negative AC current signal is converted into a first negative AC voltage signal by the second conversion unit.

[0110] In this embodiment, a first groove and a second groove are formed on the outer wall surface of the shielding shell 213 , a portion of the first conversion unit is placed in the first groove, and a portion of the second conversion unit is placed in the second groove.

[0111] Furthermore, the seventh PCB board is blocked on the outside of the first groove, the first IV conversion unit and a portion of the first connecting column are placed in the first groove, the other portion of the first connecting column is embedded in the interior of the seventh PCB board, and the seventh PCB board is fixed to the outer wall of the shielding shell 213 through the first connecting terminal and the first connecting column.

[0112] The eighth PCB board is blocked on the outside of the second groove, the second IV conversion unit and a part of the second connecting column are placed in the second groove, the other part of the second connecting column is embedded in the interior of the eighth PCB board, and the eighth PCB board is fixed on the outer wall of the shielding shell 213 through the second connecting terminal and the second connecting column.

[0113] This design facilitates fixing the first conversion unit and the second conversion unit on the outer wall of the shielding shell 213, and can fully utilize the limited space inside the housing 201. The first IV conversion unit and the second IV conversion unit are respectively located inside the first groove and the second groove, and are respectively shielded by the seventh PCB board and the eighth PCB board, so that the first IV conversion unit and the second IV conversion unit can be protected and prevented from being damaged.

[0114] In this embodiment, the stator assembly 207 is located inside the sleeve 2032. Since the conventional motor housing 101 is not provided, in order to overcome the magnetic field interference generated by the stator assembly 207, the shielding electrode 203 is made of magnetic shielding material.

[0115] Preferably, the shielding electrode 203 is made of Permalloy material.

[0116] In this embodiment, the voltage signal conversion component is used to convert the amplified AC voltage signal and the saturated signal into a DC voltage signal, and mainly includes a fourth PCB board 3, and an amplifying unit, a first signal modulation unit, a second signal modulation unit and a waveform conversion module solidified on the fourth PCB board 3. Among them, the first conversion unit and the second conversion unit are both electrically connected to the amplifying unit, the amplifying unit is electrically connected to the waveform conversion module, and the first signal modulation unit is electrically connected to the second signal modulation unit and the waveform conversion module in turn.

[0117] Furthermore, the amplifying unit is used to combine the first positive AC voltage signal and the first negative AC voltage current signal and remove interference signals to generate an amplified AC voltage signal having a signal strength greater than that of each AC voltage signal.

[0118] Optionally, the amplification unit is a differential amplification unit and / or a program-controlled amplification unit.

[0119] Preferably, the amplification unit is a differential amplification unit and a programmable amplification unit, wherein the first conversion unit and the second conversion unit are both electrically connected to the differential amplification unit, and the differential amplification unit is electrically connected to the programmable amplification unit and the waveform conversion module in turn. After the first positive AC voltage signal and the first negative AC voltage signal are input into the differential amplification unit, the differential amplification unit amplifies the first positive AC voltage signal and the first negative AC voltage signal to generate a primary amplified AC voltage signal, and after the primary amplified AC voltage signal is input into the programmable amplification unit, the programmable amplification unit amplifies the primary amplified AC voltage signal again to generate a secondary amplified AC voltage signal.

[0120] Since the amplification unit adopts a differential amplification unit and a program-controlled amplification unit, such a design can further enhance the signal strength of the AC voltage signal. In addition, since the program-controlled amplification unit includes multiple amplification factors, the AC voltage signal can be amplified to a desired factor.

[0121] Furthermore, the photoelectric tube assembly is electrically connected to the second signal modulation unit and the waveform conversion module in sequence through the first signal modulation unit, wherein the first signal modulation unit and the second signal modulation unit convert the non-square wave signal output by the photoelectric tube assembly into a saturated signal.

[0122] Furthermore, the first signal modulation unit converts the non-square wave signal output by the photoelectric tube assembly into positive and negative square wave signals, and the positive and negative square wave signals are converted into saturation signals by the second signal modulation unit.

[0123] Furthermore, the waveform conversion module is used to convert the secondary amplified AC voltage signal output by the programmable amplifier unit and the saturated signal output by the second signal modulation unit into a DC voltage signal, thereby realizing peak detection of the AC signal to obtain a DC voltage signal.

[0124] Furthermore, the waveform conversion module includes a half-wave rectifier unit, a full-wave rectifier unit and a filter unit connected in sequence. The half-wave rectifier unit converts the secondary amplified AC voltage signal and the saturation signal into a half-wave voltage signal, the full-wave rectifier unit converts the half-wave voltage signal into a full-wave voltage signal, and the filter unit converts the full-wave voltage signal into a DC voltage signal.

[0125] In this embodiment, the control component is used to convert the DC voltage signal into an electrostatic charge value corresponding to the electrostatic charge.

[0126] Further, the control component includes a fifth PCB board 4, and an MCU module and a third signal modulation unit solidified thereon. The MCU module includes an analog-to-digital conversion unit, a data processing unit, a speed acquisition unit and a PID control unit. Among them, the waveform conversion module is electrically connected to the analog-to-digital conversion unit and the data processing unit in sequence, the third signal modulation unit is electrically connected to the speed acquisition unit, and the PID control unit is electrically connected to the stator.

[0127] The analog-to-digital conversion unit samples, holds, quantizes and encodes the DC voltage signal input therein, and converts the analog DC voltage signal into a digital DC voltage signal.

[0128] The data processing unit converts the digital direct current voltage signal inputted into the data processing unit by the analog-to-digital conversion unit into a corresponding static charge value.

[0129] The input end of the third signal modulation unit is connected to the output end of the first signal modulation unit, so that the positive and negative square wave signals output by the first signal modulation unit are converted into positive square wave signals by the third signal modulation unit, and the positive square wave signals are input into the speed acquisition unit.

[0130] The rotation speed obtaining unit obtains the rotation speed value of the small blade 212 through the positive square wave signal, and inputs the rotation speed value of the small blade 212 into the data processing unit.

[0131] The PID control unit is connected to the third PCB board to input the control instruction of the stator to the third PCB board. Under the control of the control instruction, the electromagnetic coil wound on the stator drives the shielding electrode 203 and the small blade 212 to perform corresponding synchronous rotation driven by the rotating shaft 208, the first bearing 209 and the second bearing 210. The control instruction input by the PID control unit to the third PCB board includes the set speed value of the rotating shaft 208, and the set speed value is also input into the data processing unit.

[0132] After receiving the rotation speed value of the small blade input by the rotation speed acquisition unit, the data processing unit adjusts the sensitivity and signal frequency of the sensing electrode to a stable state according to the judgment result when it is determined that the rotation speed value of the small blade does not meet the preset judgment condition.

[0133] Optionally, the rotation speed value of the small blade satisfies a preset judgment condition including that the rotation speed value of the small blade is equal to a set rotation speed value, or that the rotation speed value of the small blade is equal to a preset value. The rotation speed value of the small blade does not satisfy the preset judgment condition including that the rotation speed value of the small blade is greater than or less than the set rotation speed value, or that the rotation speed value of the small blade is greater than or less than the preset value. When the rotation speed value of the small blade satisfies the preset judgment condition, it indicates that the sensitivity and signal frequency of the sensing electrode are in a stable state and no adjustment is required. When the rotation speed value of the small blade does not satisfy the preset judgment condition, it indicates that the sensitivity and signal frequency of the sensing electrode are in an unstable state and the sensitivity and signal frequency of the sensing electrode need to be adjusted to a stable state.

[0134] Further, after comparison, if the speed value of the small blade is less than the set speed value, the data processing unit inputs a boost instruction to the PID control unit, and the PID control unit generates a boost speed value according to the boost instruction, wherein the boost speed value is greater than the set speed value. The data processing unit will receive the speed value of the small blade obtained by the small blade according to the boost speed value and compare it with the set speed value again. If the current speed value of the small blade is consistent with the set speed value, the sensitivity and signal frequency of the differential sensing electrode are adjusted to a stable state. In addition, if the speed value of the small blade is greater than the set speed value, the data processing unit inputs a step-down instruction to the PID control unit, and the PID control unit generates a step-down speed value according to the step-down instruction, wherein the step-down speed value is less than the set speed value. The data processing unit will receive the speed value of the small blade obtained by the small blade according to the boost speed value and compare it with the set speed value again. If the current speed value of the small blade is consistent with the set speed value, the sensitivity and signal frequency of the differential sensing electrode are adjusted to a stable state.

[0135] By adjusting the sensitivity and signal frequency of the differential sensing electrode to a stable state, the stability of the electric field sensor is ensured, so that the sensing electrode can stably sense the weak static charge in the electrostatic field and accurately obtain the static charge value corresponding to the static charge.

[0136] In this embodiment, the power supply part includes a power supply component.

[0137] Preferably, the power supply component is the sixth PCB board 5 , the interface 6 is an RJ45 interface 6 , the end of the interface 6 is solidified on the sixth PCB board 5 , and the interface 6 is connected to an external terminal device 7 to supply power through the terminal device 7 .

[0138] Further, the sixth PCB board 5 is connected to the fourth PCB board 3, the fifth PCB board 4, the second PCB board, the third PCB board and the first PCB board respectively, and thus can supply power to the voltage signal conversion component, the control component, the photoelectric tube component, the stator component 207, and the differential sensing electrode 205. In addition, since the top of the first conversion unit and the top of the second conversion unit are both connected to the fourth PCB board 3, the first conversion unit and the second conversion unit can also be supplied with power.

[0139] In this embodiment, the seventh PCB board and the eighth PCB board are vertically arranged on the outer side of the shielding shell 213, wherein the seventh PCB board and the eighth PCB board are on the same plane. The fourth PCB board 3, the fifth PCB board 4 and the sixth PCB board 5 are sequentially stacked from bottom to top, wherein the seventh PCB board and the eighth PCB board are connected to the fourth PCB board 3 through the first connecting terminal and the second connecting terminal respectively.

[0140] Furthermore, the fourth PCB board 3, the fifth PCB board 4 and the sixth PCB board 5 are connected by the brass column, which not only forms a proper spacing area between two adjacent PCB boards to avoid contact between circuit elements of the two adjacent PCB boards, but also supplies power to the fourth PCB board 3, the fifth PCB board 4, the seventh PCB board and the eighth PCB board through the brass column.

[0141] Preferably, the length, width and thickness of the fourth PCB board 3, the fifth PCB board 4 and the sixth PCB board 5 are substantially the same, and the length and width of the fourth PCB board 3, the fifth PCB board 4 and the sixth PCB board 5 are the same as the length and width of the cover 204, the first PCB board and the lower shell 206. With this design, the length and width of the field mill electric field sensor can be limited, and at the same time, the internal structure of the field mill electric field sensor is made more compact.

[0142] In this embodiment, the first signal modulation unit, the second signal modulation unit and the third signal modulation unit may be PWM units.

[0143] In this embodiment, a plurality of fourth screws are further included. The fourth screws are connected to the cover 204, the first PCB board and the lower housing 206 in sequence. When the rotating shaft 208 guides the static charge generated during the rotation to the first bearing 209 and the second bearing 210, since the first bearing 209 and the second bearing 210 are both sleeved on the boss 215, the static charge can be guided into the housing 201 through the lower housing 206, the plurality of fourth screws and the plurality of third screws. Since the housing 201 is held in the hand, the static charge on the housing 201 is introduced into the earth through the human body.

[0144] In this embodiment, since the driving part does not include the motor housing 101, the stator assembly 207 is arranged inside the second part of the shielding electrode 203. Compared with the structure of the existing electric field sensor 2 in which the motor is located at the upper end or the lower end of the stator, the structure between the various components in the electric field sensor 2 of the present invention is more compact, and the internal space of the electric field sensor 2 can be reasonably utilized to avoid space waste. At the same time, the volume and weight of the electric field sensor 2 can also be reduced.

[0145] The first bearing 209 and the second bearing 210 are made of metal conductive materials, so the service life can be improved. In addition, the rotating shaft 208 rotates through the first bearing 209 and the second bearing 210, which can reduce wear; in addition, since the first bearing 209 and the second bearing 210 are both connected to the rotating shaft 208, when the rotating shaft 208 generates static charge, the static charge generated by the rotating shaft 208 can be guided out.

[0146] By adding a programmable amplification unit, the AC voltage signal once amplified can be amplified by different multiples through the selected amplification gear, which is beneficial for subsequent processing of the AC voltage signal.

[0147] By providing a shielding shell 213 outside the small blade 212 , the wires connected to the second PCB board and the sixth PCB board 5 , and the wires connected to the third PCB board and the sixth PCB board 5 can be prevented from contacting the small blade 212 .

[0148] By solidifying different functional components on different PCB boards and arranging multiple PCB boards in an orderly manner, compared with the method of solidifying different functional components on the same PCB board in the prior art, the circuit structure of each PCB board can be simplified and it is convenient to replace a faulty PCB board.

[0149] Embodiment 2

[0150] This embodiment provides a static electricity detection method, which is applied to the static electricity detection pen described in the first embodiment, and includes the following steps:

[0151] S1. The electrostatic charge sensing component is in direct contact with the passive object to sense the electrostatic charge on the passive object and gather the electrostatic charge into an electrostatic electric field.

[0152] Specifically, step S1 includes the following sub-steps:

[0153] S101, the front end of the probe is in direct contact with a small-area passive object to sense the static charge on the small-area passive object;

[0154] S102, the probe guides the sensed static charge to the interior of the electrode;

[0155] S103 , the electrode guides the static charge into the second region, so that the static charge is accumulated in the second region to form an electrostatic electric field.

[0156] S2. The field mill type electric field sensor senses the static charge in the electrostatic field and converts the static charge into a corresponding static charge value.

[0157] Specifically, step S2 includes the following sub-steps:

[0158] S201, converting the electrostatic charge sensed in the electrostatic electric field into a differential AC voltage signal;

[0159] S202, converting the amplified AC voltage signal and the saturated signal into a DC voltage signal;

[0160] S203, converting the DC voltage signal into an electrostatic charge value corresponding to the electrostatic charge.

[0161] In this embodiment, specifically, step S201 includes the following sub-steps:

[0162] S2011, the electrostatic charges in the electrostatic electric field are in contact with the sensitive structure to obtain a differential alternating current signal including a positive alternating current signal and a negative alternating current signal;

[0163] Further, when the shielding electrode in the sensitive structure rotates to the second position, the three rotating blades in the shielding electrode cover the outside of the second differential sensing electrode, and the electrostatic charge contacts the three rotating blades and the first differential sensing electrode to obtain a differential AC current signal including a positive AC current signal and a negative AC current signal.

[0164] S2012 , the positive alternating current signal and the negative alternating current signal are converted into a positive alternating voltage signal and a negative alternating voltage signal by each conversion unit.

[0165] Exemplarily, in step S201, when the shielding electrode rotates to the second position, the three rotating blades cover the outside of the second differential sensing electrode, and the electrostatic charge contacts the three rotating blades and the first differential sensing electrode respectively to obtain a first differential AC current signal including a first positive AC current signal and a first negative AC current signal.

[0166] The end of the first conversion unit is electrically connected to the first differential sensing electrode through the first PCB board to convert the first positive AC current signal obtained by the first differential sensing electrode into a first positive AC voltage signal. The end of the second conversion unit is electrically connected to the second differential sensing electrode through the first PCB board to convert the first negative AC current signal obtained by the second differential sensing electrode into a first negative AC voltage signal.

[0167] When the shielding electrode rotates to the first position, the three rotating blades cover the outside of the first differential sensing electrode, and the electrostatic charge contacts the three rotating blades and the second differential sensing electrode respectively to obtain a second differential AC current signal including a second positive AC current signal and a second negative AC current signal.

[0168] The end of the first conversion unit is electrically connected to the first differential sensing electrode through the first PCB board to convert the second negative AC current signal obtained by the second differential sensing electrode into a second negative AC voltage signal. The end of the second conversion unit is electrically connected to the second differential sensing electrode through the first PCB board to convert the second positive AC current signal obtained by the second differential sensing electrode into a second positive AC voltage signal.

[0169] In this embodiment, specifically, in step S202, the following sub-steps are included:

[0170] S2021. The positive AC voltage signal and the negative AC voltage signal are amplified by an amplifying unit to generate an amplified AC voltage signal.

[0171] Furthermore, the amplifying unit is used to combine the positive AC voltage signal and the negative AC voltage signal to generate an amplified AC voltage signal with a signal strength greater than that of each AC voltage signal.

[0172] Preferably, the amplification unit is a differential amplification unit and a programmable amplification unit electrically connected thereto. After the positive AC voltage signal and the negative AC voltage signal are input into the differential amplification unit, the differential amplification unit amplifies the positive AC voltage signal and the negative AC voltage signal to generate a primary amplified AC voltage signal, and after the primary amplified AC voltage signal is input into the programmable amplification unit, the programmable amplification unit amplifies the primary amplified AC voltage signal again to generate a secondary amplified AC voltage signal.

[0173] S2022. Convert the output signal of the photoelectric tube assembly into a saturation signal.

[0174] Furthermore, in step S2022, the following sub-steps are included:

[0175] S20221, the non-square wave signal output by the photoelectric tube assembly is converted into positive and negative square wave signals by the first signal modulation unit;

[0176] S20222, the positive and negative square wave signals are converted into saturated signals by a second signal modulation unit;

[0177] S20223. The saturation signal is input into the half-wave rectifier unit.

[0178] S20224. Convert the amplified AC voltage signal and the saturated signal into a DC voltage signal.

[0179] Furthermore, in step S20224, the following sub-steps are included:

[0180] The amplified AC voltage signal and the saturated signal are converted into a half-wave voltage signal by a half-wave rectifier unit;

[0181] The half-wave voltage signal is converted into a full-wave voltage signal by a full-wave rectifier unit;

[0182] The full-wave voltage signal is converted into a DC voltage signal by the filtering unit.

[0183] In step S20224, the peak value detection of the AC signal can be achieved through the half-wave rectification unit, the full-wave rectification unit and the filtering unit, so as to obtain a DC voltage signal according to the peak value of the AC signal.

[0184] In this embodiment, specifically, the waveform conversion module is electrically connected to the analog-to-digital conversion unit and the data processing unit in sequence. The analog-to-digital conversion unit samples, holds, quantizes and encodes the DC voltage signal input therein, and then converts the analog DC voltage signal into a digital DC voltage signal. The data processing unit converts the digital DC voltage signal input thereinto by the analog-to-digital conversion unit into a corresponding static charge value.

[0185] In addition, in this embodiment, before step S1, the step of adjusting the sensitivity and signal frequency of the differential sensing electrode of the field milling electric field sensor to a stable state is also included.

[0186] Specifically, the above steps include:

[0187] Under the action of the electromagnetic field, the stator assembly drives the shield electrode and the small blade to rotate synchronously through the rotating shaft according to the set speed value input by the PID control unit;

[0188] The speed acquisition unit converts the speed signal of the small blade collected by the photoelectric tube assembly into the speed value of the small blade;

[0189] When the rotation speed value of the small blade does not meet the preset judgment condition, the sensitivity and signal frequency of the differential sensing electrode are adjusted to a stable state according to the judgment result.

[0190] Optionally, the rotation speed value of the small blade satisfies a preset judgment condition including that the rotation speed value of the small blade is equal to a set rotation speed value, or that the rotation speed value of the small blade is equal to a preset value. The rotation speed value of the small blade does not satisfy the preset judgment condition including that the rotation speed value of the small blade is greater than or less than the set rotation speed value, or that the rotation speed value of the small blade is greater than or less than the preset value. When the rotation speed value of the small blade satisfies the preset judgment condition, it indicates that the sensitivity and signal frequency of the differential sensing electrode are in a stable state and no adjustment is required. When the rotation speed value of the small blade does not satisfy the preset judgment condition, it indicates that the sensitivity of the sensing electrode is in an unstable state, and the sensitivity and signal frequency of the sensing electrode need to be adjusted to a stable state.

[0191] Exemplarily, after comparison, if the rotation speed value of the small blade is less than the set rotation speed value, the data processing unit inputs a boost instruction to the PID control unit, and the PID control unit generates a boost rotation speed value according to the boost instruction, wherein the boost rotation speed value is greater than the set rotation speed value. After receiving the rotation speed value of the small blade obtained by the small blade according to the boost rotation speed value, the data processing unit compares it with the set rotation speed value again. If the current rotation speed value of the small blade is consistent with the set rotation speed value, the sensitivity and signal frequency of the differential sensing electrode are adjusted to a stable state. In addition, if the rotation speed value of the small blade is greater than the set rotation speed value, the data processing unit inputs a step-down instruction to the PID control unit, and the PID control unit generates a step-down rotation speed value according to the boost instruction, wherein the step-down rotation speed value is less than the set rotation speed value. After receiving the rotation speed value of the small blade obtained by the small blade according to the step-down rotation speed value, the data processing unit compares it with the set rotation speed value again. If the current rotation speed value of the small blade is consistent with the set rotation speed value, the sensitivity and signal frequency of the differential sensing electrode are adjusted to a stable state.

[0192] Preferably, the set speed value is an adjustable variable speed value set according to actual detection conditions, and different set speed values ​​can be input into the stator assembly through the PID control unit.

[0193] For example, when the set speed value is 80 rpm, the speed value of the small blade is 75 rpm. After comparison, it is known that the speed value of the small blade is less than the set speed value. At this time, it is determined that the speed value of the small blade does not meet the preset judgment condition. The data processing unit inputs a boost command to the PID control unit, and the PID control unit increases the set speed value to 90 rpm according to the boost command. By analyzing the speed signal of the small blade, the speed value of the small blade is obtained to be 80 rpm. After comparison, it is known that the speed value of the small blade is equal to the set speed value. At this time, the sensitivity and signal frequency of the differential sensing electrode are adjusted to a stable state.

[0194] In addition, when the set speed value is 80 rpm, the speed value of the small blade is 85 rpm. After comparison, it is known that the speed value of the small blade is greater than the set speed value. At this time, it is determined that the speed value of the small blade does not meet the preset judgment condition. The data processing unit inputs a voltage reduction instruction to the PID control unit, and the PID control unit increases the set speed value to 70 rpm according to the voltage reduction instruction. By analyzing the speed signal of the small blade, the speed value of the small blade is obtained to be 80 rpm. After comparison, it is known that the speed value of the small blade is equal to the set speed value. At this time, the sensitivity and signal frequency of the differential sensing electrode are adjusted to a stable state.

[0195] By adjusting the sensitivity and signal frequency of the differential sensing electrode to a stable state, the sensing electrode can stably sense the weak static charge in the electrostatic electric field and accurately obtain the static charge value corresponding to the static charge.

[0196] Through the detection method described in the second embodiment, the DC voltage signal can be converted into an electrostatic charge value corresponding to the electrostatic charge.

[0197] Embodiment 3

[0198] like Fig.11 As shown, this embodiment also provides an electrostatic detection device, including the electrostatic detection pen 8 recorded in Example 1, and a terminal device 7 connected to the electrostatic detection pen 8 via a wire, wherein the terminal device 7 at least displays an electrostatic charge value corresponding to the electrostatic charge.

[0199] Specifically, one end of the wire is connected to the interface in the static electricity detection pen 8 , and the other end of the wire is connected to the terminal device 7 .

[0200] The terminal device 7 mainly includes a controller, a display screen and a communication module. The static electricity detection pen 8 inputs the static charge value corresponding to the static charge into the terminal device 7 through the interface and the wire, and the controller displays the static charge value through the display screen after receiving it. In addition, after receiving the static charge value, the controller also sends the static charge value to the server 9 connected to the terminal device 7 through the communication module.

[0201] The above description is only a preferred embodiment of the present invention, which is only illustrative and not restrictive of the present invention. Those skilled in the art understand that many changes, modifications, and even equivalences may be made to the present invention within the spirit and scope defined by the claims of the present invention, but all of them will fall within the scope of protection of the present invention.

Claims

1. An electrostatic detection pen, characterized in that: include: An electrostatic charge sensing component, used to sense the electrostatic charge on a passive object and gather the electrostatic charge into an electrostatic electric field; An electric field sensor, connected to the electrostatic charge sensing component, for sensing the electrostatic charge in the electrostatic electric field and converting the electrostatic charge into a corresponding electrostatic charge value; Wherein, the electrostatic charge sensing component comprises: a housing having a collection area formed therein for collecting static charges; The electrostatic charge guiding component comprises a first end and a second end connected to each other, wherein the first end is located outside the housing and senses the electrostatic charge on the passive object after contacting the passive object; the second end is placed in the convergence area and is used to release the electrostatic charge sensed by the first end into the convergence area to form an electrostatic electric field; The housing comprises a first area and a second area which are connected and coaxially arranged, and a first assembly structure for connecting with the electric field sensor is formed on the inner wall surface of the second area; The electrostatic charge guiding component includes a connected probe and an electrode, wherein the electrode includes a connected longitudinal strip and a base a, wherein the longitudinal strip is located inside the first area, the top of the longitudinal strip is in the same plane as the top of the shell, a coaxially arranged slot is provided at the top of the longitudinal strip, and the base a is located inside the second area; the probe includes a connected external part and an internal part, wherein the internal part is located inside the slot and connected to the electrode, and the bottom end of the external part covers the outside of the top of the electrode.

2. The static electricity detection pen according to claim 1, characterized in that: The electrostatic charge guide assembly also includes an insulating component, which is clamped between the electrode and the shell, wherein the insulating component includes a longitudinal tube and a base b that are connected and coaxially arranged, the longitudinal tube is placed in the first area and abuts against the inner wall surface of the first area, and the base a is located in the second area and abuts against the inner wall surface of the top end of the second area.

3. The static electricity detection pen according to claim 2, characterized in that: A limiting protrusion is formed on the inner wall surface of the first region near the top thereof, and a limiting groove matching with the limiting protrusion is formed on the outer wall surface of the longitudinal tube near the top thereof.

4. The static electricity detection pen according to claim 2 or 3, characterized in that: The top end of the longitudinal strip, the top end of the longitudinal tube and the top end of the shell are in the same plane, and the shell, the probe, the electrode and the insulating component are coaxially arranged.

5. The static electricity detection pen according to claim 1, characterized in that: The electric field sensor is a field mill type electric field sensor, which includes a shell and an electrostatic charge processing part disposed inside the shell; Wherein, the housing comprises a second assembly structure connected to the electrostatic charge sensing component, and a charge sensing port facing the convergence area; The electrostatic charge processing part includes an electrostatic charge sensing component, a voltage signal conversion component and a control component, wherein the electrostatic charge sensing component is used to obtain an AC voltage signal, and includes a sensitive structure, a rotating component, a small blade and a stator component, wherein the sensitive structure includes a shielding electrode and a ring-shaped sensing electrode, wherein the first part of the shielding electrode is located outside the sensing electrode, and the second part of the shielding electrode is embedded inside the sensing electrode, the stator component is located inside the second part of the shielding electrode, and a part of the rotating component is located inside the stator component, the shielding electrode and the small blade are respectively connected to the first end and the second end of the rotating component, and the stator component generates an electromagnetic field after being energized, and the rotating component drives the shielding electrode and the small blade to rotate synchronously through the electromagnetic field; wherein the end of the electrode is directed toward the sensitive structure through the convergence area to guide the electrostatic charge to the shielding electrode and the sensing electrode; The voltage signal conversion component is used to convert the amplified AC voltage signal and the saturation signal into a DC voltage signal; The control component is used to convert the DC voltage signal into an electrostatic charge value corresponding to the electrostatic charge.

6. The static electricity detection pen according to claim 5, characterized in that: The sensitive structure further comprises a cover body and a lower shell body respectively arranged on the top end surface and the bottom end surface of the sensing electrode, the cover body is formed with a first hollow area, the sensing electrode is formed with a second hollow area, and the lower shell body is formed with a first concave cavity, wherein the first hollow area, the second hollow area and the first concave cavity are coaxially arranged, and the first hollow area is connected with the first concave cavity through the second hollow area; The first part of the shielding electrode is located in the first hollow area, and the second part of the shielding electrode is respectively placed in the second hollow area and the first concave cavity, and is sleeved on the outer side of the stator assembly.

7. The static electricity detection pen according to claim 6, characterized in that: The electrostatic charge sensing component also includes a photoelectric tube assembly and a shielding shell, wherein the shielding shell is located at the lower end of the lower shell, the second end of the rotating assembly, the photoelectric tube assembly and the small blade are all located inside the shielding shell, and the photoelectric tube assembly is arranged on the top end surface of the lower shell and faces the position of the small blade, so as to obtain the rotation speed signal of the small blade.

8. The static electricity detection pen according to claim 7, characterized in that: The rotating component includes a rotating shaft, and a first bearing and a second bearing respectively mounted on the outside of the rotating shaft, wherein the first end of the rotating shaft is placed inside the shielding electrode, the second end of the rotating shaft is placed inside the small blade, the first bearing is located inside the stator assembly, and the second bearing is located inside the lower shell.

9. The static electricity detection pen according to claim 7, characterized in that: The control component includes a data processing unit, a PID control unit and a speed acquisition unit, wherein the PID control unit is connected to the stator component to control the stator component to drive the rotating component to drive the shielding electrode and the small blade to rotate synchronously according to the set speed value input by the PID control unit; the speed acquisition unit is connected to the photoelectric tube component to convert the speed signal of the small blade into the speed value of the small blade; the data processing unit is used to convert the DC voltage signal into an electrostatic charge value corresponding to the electrostatic charge, and to adjust the sensitivity of the sensing electrode according to the judgment result of the speed value of the small blade and the set speed value.

10. The static electricity detection pen according to claim 5, characterized in that: The electrostatic charge processing part also includes a power supply part, which is electrically connected to the electrostatic charge sensing component, the voltage signal conversion component and the control component respectively.

11. A static electricity detection method, applied to the static electricity detection pen according to any one of claims 1 to 10, characterized in that: The following steps are involved: The electrostatic charge sensing component is in direct contact with the passive object to sense the electrostatic charge on the passive object and gather the electrostatic charge into an electrostatic electric field; The electric field sensor senses the electrostatic charge in the electrostatic field and converts the electrostatic charge into a corresponding electrostatic charge value.

12. An electrostatic detection device, comprising the electrostatic detection pen according to any one of claims 1 to 10, characterized in that: It also includes a terminal device connected to the static electricity detection pen, wherein the terminal device at least displays the static charge value corresponding to the static charge.

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